The Purify memory leak reporting is a separate issue: whether or not memory is really leaked from FMOD is the question I’d like answered… like I say, it also reports mem. leaks on standard D3D sample applications which make me suspicious of what it’s saying about FMOD…

I got this Purify leak as well under v3.33, with exactly the same circumstances; when opening a stream.
I reported it here a few weeks ago. Purify really is quite good at detecting this stuff, but indeed, it also complains about system DLLs as well (which is not surprising actually, since we’re on Windows 😉 ).